code: def forward(ctx, x, alpha):
      ctx.save_for_backward(x, alpha)
      return torch.clamp(x, 0, alpha.data)
  
file_path: ignite/examples/cifar10_qat/pact.py
imports: import torch
  import torch.nn
label_desc: Use image node_id 1 for calling the PACTClip obj's underlying member method code with example usage: obj.forward(ctx, x, alpha) and returns: torch